How can I remove old content from Google's index?

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Google Search Central

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Published on November 24, 2009 12:20:24 AM ● Video Link: https://www.youtube.com/watch?v=zpg1V6Kow-Y

Duration: 2:16

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Sebastian from Germany asks: "We still have old content in the index. We block them via robots.txt, use 404 and delete them via Webmaster Tools, but Google keeps it. What can we do to quickly delete content from the index?